public abstract class Ellipse2D extends RectangularShape
Ellipse2D
class describes an ellipse that is defined
by a framing rectangle.
This class is only the abstract superclass for all objects which store a 2D ellipse. The actual storage representation of the coordinates is left to the subclass.
Modifier and Type  Class and Description 

static class 
Ellipse2D.Double
The
Double class defines an ellipse specified
in double precision. 
static class 
Ellipse2D.Float
The
Float class defines an ellipse specified
in float precision. 
Modifier  Constructor and Description 

protected 
Ellipse2D()
This is an abstract class that cannot be instantiated directly.

Modifier and Type  Method and Description 

boolean 
contains(double x,
double y)
Tests if the specified coordinates are inside the boundary of the
Shape , as described by the
definition of insideness. 
boolean 
contains(double x,
double y,
double w,
double h)
Tests if the interior of the
Shape entirely contains
the specified rectangular area. 
boolean 
equals(Object obj)
Determines whether or not the specified
Object is
equal to this Ellipse2D . 
PathIterator 
getPathIterator(AffineTransform at)
Returns an iteration object that defines the boundary of this
Ellipse2D . 
int 
hashCode()
Returns the hashcode for this
Ellipse2D . 
boolean 
intersects(double x,
double y,
double w,
double h)
Tests if the interior of the
Shape intersects the
interior of a specified rectangular area. 
clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal
finalize, getClass, notify, notifyAll, toString, wait, wait, wait
getBounds2D
protected Ellipse2D()
Ellipse2D.Float
,
Ellipse2D.Double
public boolean contains(double x, double y)
Shape
, as described by the
definition of insideness.x
 the specified X coordinate to be testedy
 the specified Y coordinate to be testedtrue
if the specified coordinates are inside
the Shape
boundary; false
otherwise.public boolean intersects(double x, double y, double w, double h)
Shape
intersects the
interior of a specified rectangular area.
The rectangular area is considered to intersect the Shape
if any point is contained in both the interior of the
Shape
and the specified rectangular area.
The Shape.intersects()
method allows a Shape
implementation to conservatively return true
when:
Shape
intersect, but
Shapes
this method might
return true
even though the rectangular area does not
intersect the Shape
.
The Area
class performs
more accurate computations of geometric intersection than most
Shape
objects and therefore can be used if a more precise
answer is required.x
 the X coordinate of the upperleft corner
of the specified rectangular areay
 the Y coordinate of the upperleft corner
of the specified rectangular areaw
 the width of the specified rectangular areah
 the height of the specified rectangular areatrue
if the interior of the Shape
and
the interior of the rectangular area intersect, or are
both highly likely to intersect and intersection calculations
would be too expensive to perform; false
otherwise.Area
public boolean contains(double x, double y, double w, double h)
Shape
entirely contains
the specified rectangular area. All coordinates that lie inside
the rectangular area must lie within the Shape
for the
entire rectanglar area to be considered contained within the
Shape
.
The Shape.contains()
method allows a Shape
implementation to conservatively return false
when:
intersect
method returns true
and
Shape
entirely contains the rectangular area are
prohibitively expensive.
Shapes
this method might
return false
even though the Shape
contains
the rectangular area.
The Area
class performs
more accurate geometric computations than most
Shape
objects and therefore can be used if a more precise
answer is required.x
 the X coordinate of the upperleft corner
of the specified rectangular areay
 the Y coordinate of the upperleft corner
of the specified rectangular areaw
 the width of the specified rectangular areah
 the height of the specified rectangular areatrue
if the interior of the Shape
entirely contains the specified rectangular area;
false
otherwise or, if the Shape
contains the rectangular area and the
intersects
method returns true
and the containment calculations would be too expensive to
perform.Area
,
Shape.intersects(double, double, double, double)
public PathIterator getPathIterator(AffineTransform at)
Ellipse2D
.
The iterator for this class is multithreaded safe, which means
that this Ellipse2D
class guarantees that
modifications to the geometry of this Ellipse2D
object do not affect any iterations of that geometry that
are already in process.at
 an optional AffineTransform
to be applied to
the coordinates as they are returned in the iteration, or
null
if untransformed coordinates are desiredPathIterator
object that returns the
geometry of the outline of this Ellipse2D
,
one segment at a time.public int hashCode()
Ellipse2D
.hashCode
in class Object
Ellipse2D
.Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
public boolean equals(Object obj)
Object
is
equal to this Ellipse2D
. The specified
Object
is equal to this Ellipse2D
if it is an instance of Ellipse2D
and if its
location and size are the same as this Ellipse2D
.equals
in class Object
obj
 an Object
to be compared with this
Ellipse2D
.true
if obj
is an instance
of Ellipse2D
and has the same values;
false
otherwise.Object.hashCode()
,
HashMap
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